The Rugby World Cup Sevens, held in the U.S. for the first time, airs live on NBC, NBCSN and Olympic Channel: Home of Team USA on Friday, Saturday and Sunday from San Francisco’s AT&T Park.

NBC Sports’ TV coverage totals more than 30 live hours. NBC Sports Gold will also stream live, commercial-free coverage of every match with its “Rugby Pass.”

NBCSports.com/live and the NBC Sports app will stream all NBC Sports and Olympic Channel TV coverage.

The Rugby World Cup Sevens is the biggest standalone competition outside of the Olympics for an event that debuted at the Rio Games. Traditional 15-a-side rugby was played at the Olympics in 1900, 1908, 1920 and 1924.

Like the Olympics, the World Cup takes place every four years, now in the middle of every Olympic cycle, with men’s and women’s competitions at the same site.

New Zealand is the defending World Cup champion for men and women, though Fiji took the men’s Olympic title and Australia the women’s gold in Rio.

The U.S. finished fifth (women) and sixth (men) in this season’s World Series standings, though the U.S. men won the only World Series leg played in the U.S. in Las Vegas in March.

The U.S. men are led by Perry Baker, the 2017 World Player of the Year, and Carlin Isles, the 2018 World Series leader in tries. The U.S. women feature Naya Tapper and Rio Olympian Alev Kelter, two of the top scorers from the World Series.

The NBC Sports broadcast team includes U.S. Olympian and Super Bowl champion Nate Ebner as a studio analyst. Leigh Diffey and Bill Seward are on play-by-play, and Ahmed Fareed hosts on-site studio coverage.

Former USA Sevens captain Brian Hightower, U.S. Rugby Hall of Fame member Dan Lyle, former Premiership Rugby and English international prop Alex Corbisiero and World Rugby Hall of Famer Phaidra Knight will provide game and studio commentary.

NUR-SULTAN, Kazakhstan — Matt Lindland sees progress taking place within the United States Greco-Roman program.

He sees accountability and ownership. He sees a desire to compete with the global Greco powers and a willingness to pay the price to get there.

“There’s definitely been progress,” Lindland said. “We’ve got great guys. It’s about them. They want to be here. They want to do what it’s going to take to get to that next level, and you can see it. They’re frustrated when things don’t go their way, and they’re going to figure out how to fix those things. Yeah, we’re making the right progress. We’ve got the right guys, we’ve got the right attitude.”

But Lindland also sees hesitation at times, too. He sees too much analyzing and not enough reactionary aggression.

“I think our guys are second-guessing themselves, they’re questioning and they’re thinking,” he said. “They’re thinking about what’s going to happen instead of being in the moment and just being present and letting things fly. Really great athletes out there on America’s team and they’re super capable. When they start thinking and questioning what’s going to happen and wondering what the referee is going to call, they’ve just got to go out there and do what they’re all capable of doing.”

Both dynamics — the signs progress and the work-in-progress symbols — were on display Saturday on the opening day of the World Championships.

Max Nowry, Ryan Mango and Raymond Bunker notched opening-round wins Saturday. For perspective, only three Americans posted Greco victories at the World Championships in 2018.

On the flip side, though, each of the three ran into roadblocks when they couldn’t hold leads in their second bout, and Mango and Bunker got eliminated later in the day.

Nowry and John Stefanowicz, however, got pulled into the repechage and have a chance to wrestle Sunday for medals. Nowry got an extra opportunity when Kazakhstan’s Khorlan Zhakansha stunned 2018 World champ and No. 1 seed Eldaniz Azizli of Azerbaijan, 11-5, in the 55-kilogram semifinals.

Stefanowicz dropped a 7-0 decision in the Round of 16 at 82 kilograms against Georgia’s Lasha Gobadze. But the Georgian posted two more victories to set Stefanowicz up with another chance at a medal.

Sky Brown, an 11-year-old who appears en route to becoming the youngest female Summer Olympian in 50 years, took third at the world skateboarding championships in Sao Paulo on Saturday. The sport debuts at the Olympics in Tokyo.

Brown posted her highest score of her four finals runs in the last round, 58.13 points, of the park event. It was not enough to overtake Japanese Misugu Okamoto and Sakura Yosozumi. The new world champion Okamoto is 13 years old. Yosozumi is 17.

Brown has been raised in Japan by a Japanese mother and a British father. The 2018 Dancing with the Stars: Juniors winner appeared in a Nike “Dream Crazier” ad with Simone Biles, Serena Williams and Chloe Kim in February.

She has not clinched an Olympic spot yet but is well on her way as the qualifying season continues.

She turns 12 years old just before the Tokyo Olympics begin and would be the youngest Olympian since Romanian rowing coxswain Carlos Front at the 1992 Barcelona Games.

She would be the youngest female Olympian since Chinese ice dancer Liu Luyang in 1988 and the youngest female Summer Olympian since Puerto Rican swimmer Liana Vicens in 1968, according to the OlyMADMen.

The Tokyo Games feature four skateboarding events — men’s and women’s street and park.